This is a catapult I made in Sketchup after printing the one from Microsoft. This one is much larger and can hold more. If you notice anything wrong with it please feel free to let me know in the comments. I will often be working on making it better on my own. UPDATE: This model now has the latest STL which is the fixed one.Print the stl that is here. In Slic3r I would use 5% honeycomb fill, .2mm layers, 1-2 solid bottom, 2-3 solid top, no support or raft.